Improper wearing of sunglasses is prone to eye diseases, and it is not necessary to wear sunglasses in dark conditions such as cloudy and indoor conditions. Some people, regardless of the occasion, regardless of the intensity of the sun, wear sunglasses even at dusk, in the evening and when watching movies and TV. This will inevitably increase the burden of eye regulation, cause eye muscle tension and fatigue, and cause vision loss, vision Objects are blurred, and dizziness and other symptoms may occur in severe cases. It is not suitable for infants, children, etc. whose visual system is not well developed to wear sunglasses. Except for the glass lens sunglasses, other sunglasses lens materials are not high in abrasion resistance. Users should always pay attention to the surface condition of the sunglasses. When the wear affects the clarity, they should be replaced in time.